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Data storage device, apparatus and method for using same

  • US 9,430,727 B2
  • Filed: 02/12/2013
  • Issued: 08/30/2016
  • Est. Priority Date: 10/23/1999
  • Status: Expired due to Fees
First Claim
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1. A method for producing a portable card for use in a card processing system including a data processing station, the method comprising:

  • forming a data storage device on a substrate having a generally rectangular shape such that the data storage device includes a hard disk drive recording medium including;

    depositing at least one layer of high density, high coercivity magnetic material on said substrate such that said high density, high coercivity magnetic material includes a plurality of magnetic domains configured to store magnetic signals, said plurality of magnetic domains having an areal density of between 2 megabits per sq. in. to about 10 gigabits per sq. in. and having a storage capacity of more than 500 megabytes and being adapted to operably interact with said data processing station when the data storage device and the data processing station are moved relative to each other; and

    depositing a hard, abradeable protective coating on said magnetic material layer, wherein the protective coating has at least one layer which includes a magnetically permeable, magnetically saturable material;

    physically affixing the data storage device on a protective housing of a standard credit card size as specified by ANSI/ISO/IEC 7810 such that said data storage device is one of (a) rigidly affixed to the protective housing and (b) movably disposed inside the protective housing, whereby said combined storage data device and said protective housing form said portable card, said protective housing having at least one housing section that is movable relative to the data storage device such that said data storage device is shielded by said at least one housing section when said at least one housing section is in a first configuration, and said data storage device is operably exposed for interaction with the data processing station when said at least one housing section is in a second configuration.

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